P0641 Diagnostic Trouble Code Discussion for June 2012
5-Volt Reference 1 Circuit Malfunction
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| Help Request | Posted | |
| 2007 Chevrolet Silverado 2500 HD WT 6.0L Hesitation, MIL Lamp on, Reduced power VIN: 1GCHK24K27 P0641: 5-Volt Reference 1 Circuit Malfunction. Recurring code P0641 (5 volt ref circuit 1).Have seen the voltage drop out for a split second,down to .75volts. Have not been able to duplicate in the shop.tried wiggle tests of the sensors on that circuit.Inspected wiring best as possible without ripping into... |
June 26, 2012 |
